<template>
  <div class="sc-upload-file">
    <el-upload
      :disabled="disabled"
      :auto-upload="autoUpload"
      :action="action"
      :name="name"
      :data="data"
      :http-request="request"
      v-model:file-list="defaultFileList"
      :show-file-list="showFileList"
      :drag="drag"
      :accept="accept"
      :multiple="multiple"
      :limit="limit"
      :before-upload="before"
      :on-success="success"
      :on-error="error"
      :on-preview="handlePreview"
      :on-exceed="handleExceed"
    >
      <slot>
        <el-button type="primary" :disabled="disabled"
          >Click to upload</el-button
        >
      </slot>
      <template #tip>
        <div v-if="tip" class="el-upload__tip">{{ tip }}</div>
      </template>
    </el-upload>

    <el-dialog v-model="dialogVisible">
      <img w-full :src="dialogImageUrl" alt="Preview Image" />
    </el-dialog>

    <span style="display: none !important"
      ><el-input v-model="value"></el-input
    ></span>
  </div>
</template>

<script>
import config from "@/config/upload"

export default {
  props: {
    modelValue: { type: [String, Array], default: "" },
    tip: { type: String, default: "" },
    action: { type: String, default: "" },
    apiObj: { type: Object, default: () => { } },
    name: { type: String, default: config.filename },
    data: { type: Object, default: () => { } },
    accept: { type: String, default: "" },
    maxSize: { type: Number, default: config.maxSizeFile },
    limit: { type: Number, default: 0 },
    autoUpload: { type: Boolean, default: true },
    showFileList: { type: Boolean, default: true },
    drag: { type: Boolean, default: false },
    multiple: { type: Boolean, default: true },
    disabled: { type: Boolean, default: false },
    onSuccess: { type: Function, default: () => { return true } }
  },
  data () {
    return {
      value: "",
      defaultFileList: [],
      dialogImageUrl: '',
      dialogVisible: false,
    }
  },
  watch: {
    modelValue (val) {
      if (Array.isArray(val)) {
        if (JSON.stringify(val) != JSON.stringify(this.formatArr(this.defaultFileList))) {
          this.defaultFileList = val
          this.value = val
        }
      } else {
        if (val != this.toStr(this.defaultFileList)) {
          this.defaultFileList = this.toArr(val)
          this.value = val
        }
      }
    },
    // showFileList: {
    //   handler (val) {
    //     console.log(val)
    //   }
    // },
    defaultFileList: {
      handler (val) {
        this.$emit('update:modelValue', Array.isArray(this.modelValue) ? this.formatArr(val) : this.toStr(val))
        this.value = this.toStr(val)
      },
      deep: true
    }
  },
  mounted () {
    this.defaultFileList = Array.isArray(this.modelValue) ? this.modelValue : this.toArr(this.modelValue)
    this.value = this.modelValue
  },
  methods: {
    //默认值转换为数组
    toArr (str) {
      var _arr = []
      var arr = str.split(",")
      arr.forEach(item => {
        if (item) {
          var urlArr = item.split('/')
          var fileName = urlArr[urlArr.length - 1]
          _arr.push({
            name: fileName,
            url: item
          })
        }
      })
      return _arr
    },
    //数组转换为原始值
    toStr (arr) {
      return arr.map(v => v.url).join(",")
    },
    //格式化数组值
    formatArr (arr) {
      var _arr = []
      arr.forEach(item => {
        if (item) {
          _arr.push({
            name: item.name,
            url: item.url
          })
        }
      })
      return _arr
    },
    before (file) {
      const maxSize = file.size / 1024 / 1024 < this.maxSize
      if (!maxSize) {
        this.$message.warning(`上传文件大小不能超过 ${this.maxSize}MB!`)
        return false
      }
    },
    success (res, file) {
      console.log(res)
      var os = this.onSuccess(res, file)
      if (os != undefined && os == false) {
        return false
      }
      // var response = config.parseData(res)
      file.name = res.data.fileName
      file.url = res.data.filePath
    },
    error (err) {
      this.$notify.error({
        title: '上传文件未成功',
        message: err
      })
    },
    beforeRemove (uploadFile) {
      return this.$confirm(`是否移除 ${uploadFile.name} ?`, '提示', {
        type: 'warning',
      }).then(() => {
        return true
      }).catch(() => {
        return false
      })
    },
    handleExceed () {
      this.$message.warning(`当前设置最多上传 ${this.limit} 个文件，请移除后上传!`)
    },
    handlePreview (uploadFile) {
      let arr = uploadFile.name.split('.')
      let type = arr[arr.length - 1]
      let imageType = 'jpg/png/jpeg/svg'
      if (imageType.includes(type)) {
        this.dialogImageUrl = uploadFile.url
        this.dialogVisible = true
      } else {
        window.open(uploadFile.url)
      }

    },
    request (param) {
      var apiObj = config.apiObjFile
      if (this.apiObj) {
        apiObj = this.apiObj
      }
      const data = new FormData()
      data.append(param.filename, param.file)
      for (const key in param.data) {
        data.append(key, param.data[key])
      }
      apiObj.post(data, {
        onUploadProgress: e => {
          const complete = parseInt(((e.loaded / e.total) * 100) | 0, 10)
          param.onProgress({ percent: complete })
        }
      }).then(res => {
        var response = config.parseData(res)
        if (response.code == config.successCode) {
          param.onSuccess(res)
        } else {
          param.onError(response.msg || "未知错误")
        }
      }).catch(err => {
        param.onError(err)
      })
    }
  }
}
</script>

<style scoped>
.el-form-item.is-error .sc-upload-file:deep(.el-upload-dragger) {
  border-color: var(--el-color-danger);
}
.sc-upload-file {
  width: 100%;
}
.sc-upload-file:deep(.el-upload-list__item) {
  transition: none !important;
}
</style>
